You need a map or a picture of what you are talking about so i can help find you the answer so please take a picture and post it so i can see it.
Here are the numbers from least to greatest
1.6,1.65,15/8,7/4
A, C. A is obviously correct because it’s the e same thing and C you combine like terms (2n+n=3n,2+4=6,=3n+6) it’s not B because it’s not 18, it’s not D because you’d get 3n+18 and it’s not E because you’d get 3n+12, meaning the only correct answers are A and C
